(7) Iris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 May 2026	10.9	2.688 AU	2.503 AU	10h24m	+03°40'	89.2°	22.1°
Opposition	25 May 2027	9.5	2.890 AU	1.878 AU	16h05m	-23°11'	177.7°	0.8°

The interactive orbit chart above shows the body's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of Iris are:

            e (Eccentricity)                : 0.2302133
            a (Semimajor axis)              : 2.3865290
            i (Inclination)                 : 5.51882
            Ω (Longitude of ascending node) : 259.49459
            ω (Argument of perihelion)      : 145.48205
            M (Mean anomaly)                : 61.72501
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 225.10083
            B (Latitude of perihelion)      : 3.12403
            P (Orbital period in years)     : 3.69            
        

The light curve chart below shows the estimated development of the minor planet's magnitude.

The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.

The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-05-29 00:00 UT   10 24 25.0   +03 40 39     2.503    2.688   89.2   22.1   112   10.9 
2026-05-29 20:00 UT   10 25 09.2   +03 38 10     2.516    2.690   88.6   22.1   112   10.9 
2026-05-30 00:00 UT   10 25 18.1   +03 37 39     2.518    2.690   88.5   22.1   112   10.9 
2026-05-31 00:00 UT   10 26 11.9   +03 34 33     2.533    2.692   87.8   22.1   112   10.9 
2026-06-01 00:00 UT   10 27 06.4   +03 31 22     2.548    2.694   87.0   22.1   112   11.0 
2026-06-02 00:00 UT   10 28 01.6   +03 28 04     2.563    2.696   86.3   22.1   112   11.0 
2026-06-03 00:00 UT   10 28 57.5   +03 24 40     2.578    2.697   85.6   22.0   112   11.0 
2026-06-04 00:00 UT   10 29 54.1   +03 21 10     2.593    2.699   84.9   22.0   112   11.0 
2026-06-05 00:00 UT   10 30 51.4   +03 17 34     2.608    2.701   84.2   21.9   112   11.0 
2026-06-06 00:00 UT   10 31 49.3   +03 13 53     2.623    2.703   83.5   21.9   112   11.0 
2026-06-07 00:00 UT   10 32 47.8   +03 10 05     2.638    2.705   82.8   21.9   112   11.0 
2026-06-08 00:00 UT   10 33 47.0   +03 06 13     2.653    2.707   82.1   21.8   113   11.0 
2026-06-09 00:00 UT   10 34 46.8   +03 02 14     2.668    2.709   81.4   21.7   113   11.1 
2026-06-10 00:00 UT   10 35 47.2   +02 58 10     2.683    2.710   80.7   21.7   113   11.1 
2026-06-11 00:00 UT   10 36 48.2   +02 54 01     2.698    2.712   80.0   21.6   113   11.1 
2026-06-12 00:00 UT   10 37 49.8   +02 49 46     2.712    2.714   79.3   21.6   113   11.1 
2026-06-13 00:00 UT   10 38 52.0   +02 45 25     2.727    2.716   78.6   21.5   113   11.1 
2026-06-14 00:00 UT   10 39 54.7   +02 40 60     2.742    2.718   77.9   21.4   113   11.1 
2026-06-15 00:00 UT   10 40 58.0   +02 36 29     2.757    2.719   77.3   21.4   113   11.1 
2026-06-16 00:00 UT   10 42 01.8   +02 31 53     2.771    2.721   76.6   21.3   113   11.1 
2026-06-17 00:00 UT   10 43 06.1   +02 27 11     2.786    2.723   75.9   21.2   113   11.1 
2026-06-18 00:00 UT   10 44 11.0   +02 22 25     2.800    2.725   75.2   21.1   114   11.2 
2026-06-19 00:00 UT   10 45 16.4   +02 17 34     2.815    2.726   74.6   21.1   114   11.2 
2026-06-20 00:00 UT   10 46 22.2   +02 12 38     2.829    2.728   73.9   21.0   114   11.2 
2026-06-21 00:00 UT   10 47 28.5   +02 07 37     2.844    2.730   73.2   20.9   114   11.2 
2026-06-22 00:00 UT   10 48 35.4   +02 02 31     2.858    2.732   72.6   20.8   114   11.2 
2026-06-23 00:00 UT   10 49 42.6   +01 57 20     2.873    2.733   71.9   20.7   114   11.2 
2026-06-24 00:00 UT   10 50 50.3   +01 52 05     2.887    2.735   71.3   20.6   114   11.2 
2026-06-25 00:00 UT   10 51 58.5   +01 46 46     2.901    2.737   70.6   20.5   114   11.2 
2026-06-26 00:00 UT   10 53 07.0   +01 41 22     2.915    2.739   70.0   20.4   114   11.2 
2026-06-27 00:00 UT   10 54 16.0   +01 35 54     2.929    2.740   69.3   20.3   114   11.2 
2026-06-28 00:00 UT   10 55 25.4   +01 30 21     2.943    2.742   68.7   20.2   114   11.3 

    Terminology:
            
    delta:  distance between minor planet and earth in AU
    radius: distance between minor planet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-minor planet)    
    phase:  phase angle in degrees (angle sun-minor planet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    

Orbital elements provided by the MPC (Minor Planet Center).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.